I'm trying to use this method of navigation for my responsive website: http://css-tricks.com/convert-menu-to-dropdown/

The problem I'm having is my navigation for mobile isn't working. I can select the items but it doesn't send me to any page when I select a item from the list. Here is the website: http://css-tricks.com/convert-menu-to-dropdown/

Anyone have any idea why it's not functioning how it should?

Thanks,